This is the time to be patient. The aggressive compression means the decompression and installation process will take significantly longer than a standard installation. Do not run other demanding programs during this time, and do not interrupt the process .
Selective downloads strip out languages you do not need, saving both time and bandwidth. However, there are also notable trade-offs: Starcraft Broodwar Fitgirl Repack
If you download the repack, the process typically looks like this: This is the time to be patient